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25 lines
761 B
25 lines
761 B
7 years ago
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// Package binarydist implements binary diff and patch as described on
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// http://www.daemonology.net/bsdiff/. It reads and writes files
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// compatible with the tools there.
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package binarydist
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var magic = [8]byte{'B', 'S', 'D', 'I', 'F', 'F', '4', '0'}
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// File format:
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// 0 8 "BSDIFF40"
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// 8 8 X
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// 16 8 Y
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// 24 8 sizeof(newfile)
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// 32 X bzip2(control block)
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// 32+X Y bzip2(diff block)
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// 32+X+Y ??? bzip2(extra block)
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// with control block a set of triples (x,y,z) meaning "add x bytes
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// from oldfile to x bytes from the diff block; copy y bytes from the
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// extra block; seek forwards in oldfile by z bytes".
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type header struct {
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Magic [8]byte
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CtrlLen int64
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DiffLen int64
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NewSize int64
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}
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